Girolamo Trombetti (c. 1550–1630) was an Italian composer and music theorist of the late Renaissance and early Baroque periods. He is best known for his contributions to vocal music, particularly in the genres of madrigals and sacred music. Trombetti's notable works include a collection of madrigals titled "Madrigali," published in 1595, which showcases the intricate polyphonic style characteristic of the time. His sacred compositions, such as "Missa super 'In illo tempore,'" highlight his ability to blend traditional liturgical forms with emerging Baroque sensibilities. Trombetti's impact on music lies in his role as a bridge between Renaissance and Baroque styles, influencing the development of vocal techniques and choral arrangements. His theoretical writings, which often discussed counterpoint and harmony, contributed to the evolving understanding of music theory during this transitional period. By combining intricate vocal lines with emotional expression, Trombetti helped pave the way for future composers in the Baroque era, ultimately enriching the tapestry of Western classical music.